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Bug 156908

Summary: strace -f kmodule -d panics kernel
Product: [Fedora] Fedora Reporter: Alexandre Oliva <oliva>
Component: kernelAssignee: Dave Jones <davej>
Status: CLOSED RAWHIDE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: djuran, greenrd, pfrields, wtogami
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-09-04 22:58:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Description Flags
patch posted to lkml that allegedly fixes the problem none

Description Alexandre Oliva 2005-05-05 04:44:32 UTC
If you run:

root# strace -f kmodule -d 

on kernel 2.6.11-1.1284_FC4 (UP i686), the output will end with something like:

clone(Process 4326 attached
child_tidptr=0xb7fcb708) = 4326
[pid  4320] exit_group(0)               = ?

and the box may freeze, after leaving the following trail in /var/log/messages:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: nfsd exportfs lockd parport_pc
lp parport autofs4 i2c_dev i2c_core rfcomm l2cap bluetooth tun sunrpc pcmcia
ipt_REJECT ipt_LOG ipt_state iptable_filter iptable_nat ip_conntrack
iptable_mangle ip_tables video button battery ac md5 ipv6 yenta_socket
rsrc_nonstatic pcmcia_core snd_maestro3 snd_ac97_codec snd_seq_dummy snd_seq_oss
snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm
snd_timer snd_page_alloc snd soundcore e100 mii floppy dm_snapshot dm_zero
dm_mirror ext3 jbd dm_mod usb_storage uhci_hcd sbp2 ohci1394 ieee1394 sd_mod
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00010286   (2.6.11-1.1284_FC4)
EIP is at _stext+0x3feffdd8/0x8
eax: d42ee000   ebx: 01200011   ecx: 00000000   edx: 00000000
esi: d3b01000   edi: d46b0bc4   ebp: d42ee000   esp: d42eefc4
ds: 007b   es: 007b   ss: 0068
Process kmodule (pid: 4326, threadinfo=d42ee000 task=d3b01000)
Stack: 01202011 00000000 00000000 00000000 b7fcb708 bfbec4cc 00000000 c010007b
       c010007b 00000078 00fd3402 00000073 00000282 bfbec474 0000007b
Call Trace:
Code:  Bad EIP value.
 <0>Fatal exception: panic in 5 seconds

Comment 1 Alexandre Oliva 2005-05-05 19:36:14 UTC
Created attachment 114066 [details]
patch posted to lkml that allegedly fixes the problem

As luck would have it, Krzysztof Halasa <> ran into the same
problem earlier today and posted about it to lkml.  Alexander Nyberg
<> posted the attached e-mail containing a patch, and Krzysztof
confirmed it fixed the bug.

Comment 2 Roland McGrath 2005-05-09 08:08:27 UTC
*** Bug 156045 has been marked as a duplicate of this bug. ***

Comment 3 Dave Jones 2005-05-10 20:17:17 UTC
this patch is included in -rc4, so 1290 and above should have it.
(you can grab it early from

it'll be in tomorrows rawhide

Comment 4 Dave Jones 2005-05-10 21:27:22 UTC
*** Bug 157141 has been marked as a duplicate of this bug. ***